It was a frosty standoff between designers Tom Ford and Valentino over “The King’s Speech” star Colin Firth at the Sunset Tower Hotel’s Tower Bar on Tuesday night. Spies say Ford was dining with Firth when Valentino, retired from fashion but now the subject of a documentary, waltzed in, “looked at Tom’s table and was noticeably upset to see him with the celebrity of Oscar season. Valentino kept staring at Tom’s table with daggers, like he was jealous that Tom had the best celebrity accessory in town. Finally, he went over to introduce himself.”